ADC outputs 3.5volt!

[Ala]

hey there

I have a STM32f030C8t6 which I wish to read 2 Analog values by it. I use ADC DMA for this. but as soon as I use command

HAL_ADC_Start_DMA(&hadc,(uint32_t *)ADC_SEN,2);  //Starting ADC1

I can see my ADC pins' volt are as high as 3.5volts!

why is that?

[Ala]

I mean, does Cube set these registers?

does Cube set GPIO_PUPDR registers for ADC pins?

[TDK]

What is VDDA/VREF+ on your board?

Measuring ADC pins with nothing connected to it is of limited use. What voltage do you think it should be?